tmpl/invoke.cpp

The following code example is taken from the book
C++17 - The Complete Guide by Nicolai M. Josuttis, Leanpub, 2017
The code is licensed under a Creative Commons Attribution 4.0 International License.

---

// raw code

#include "invoke.hpp"
#include <iostream>
#include <vector>

void print(const std::vector<int>& coll)
{
  std::cout << "elems: ";
  for (const auto& elem : coll) {
    std::cout << elem << ' ';
  }
  std::cout << '\n';
}

int main()
{
  std::vector<int> vals{0, 8, 15, 42, 13, -1, 0};

  call([&vals] {
         std::cout << "size: " << vals.size() << '\n';
       });
  call(print, vals);

  call(&decltype(vals)::pop_back, vals);
  call(print, vals);

  call(&decltype(vals)::clear, vals);
  call(print, vals);
}